In any situation like this then it is often useful to let the nursing staff know if you would like to be called in a specific situation…here you have assumed 500 ml further loss but you might want them to call you if the urine output drops, if the tachycardia does not resolve with fluids or if then continue to vomit despite the NG tube.

​You would also want to arrange when to re-check the bloods (no longer than 24 hours I would suggest with that potassium)

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